| T O P I C R E V I E W |
| PolisTyrol |
Posted - 02/21/2014 : 10:43:36 AM
Origin Ver. and Service Release: 9.0.0G (64-bit) SR1
Operating System: Windows 7
Dear all,
I have data looking more or less like that:
1 50,0
2 47,5
3 45,1
4 42,9
5 40,7
6 38,7
7 36,8
8 31,0
9 24,4
10 17,1
11 12,0
12 8,4
13 5,9
14 4,1
15 2,9
If viewed with logarithmic y-scale, one can clearly see two regions of different slopes. In this example, its easy to determine the border between those two regions ("onset"), but there are other examples where it's more difficult. The best way to determine the onset is to approximate both regions by a linear line (linear in the logarithmic scale) and to find the intersect of those two lines.
So far I do it manually, but I would much prefer to create an automatism. It would be easy in Matlab, but is there also a way in Origin?
Regards, Polis |
| 1 L A T E S T R E P L I E S (Newest First) |
| zahraa |
Posted - 02/21/2014 : 11:10:11 AM
Hi Polis,
You can use the Estimate Onset of Slope Change File Exchange Tool, downloaded here:
http://www.originlab.com/fileexchange/details.aspx?fid=107
Instructions on how to download and use the tool are provided on this page and in a pdf that is accesible when you download the tool.
Thanks
Zahra
Example created using the Four Point:
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